remove redundant license headers from zig standard library

We already have a LICENSE file that covers the Zig Standard Library. We
no longer need to remind everyone that the license is MIT in every single
file.

Previously this was introduced to clarify the situation for a fork of
Zig that made Zig's LICENSE file harder to find, and replaced it with
their own license that required annual payments to their company.
However that fork now appears to be dead. So there is no need to
reinforce the copyright notice in every single file.

8 files changed, 0 insertions, 48 deletions

diff --git a/lib/std/Thread/AutoResetEvent.zig b/lib/std/Thread/AutoResetEvent.zig
index 13e404d602..49639d60e9 100644
--- a/lib/std/Thread/AutoResetEvent.zig
+++ b/lib/std/Thread/AutoResetEvent.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Similar to `StaticResetEvent` but on `set()` it also (atomically) does `reset()`.
 //! Unlike StaticResetEvent, `wait()` can only be called by one thread (MPSC-like).
 //!
diff --git a/lib/std/Thread/Condition.zig b/lib/std/Thread/Condition.zig
index 9513e794ed..647a50b913 100644
--- a/lib/std/Thread/Condition.zig
+++ b/lib/std/Thread/Condition.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A condition provides a way for a kernel thread to block until it is signaled
 //! to wake up. Spurious wakeups are possible.
 //! This API supports static initialization and does not require deinitialization.
diff --git a/lib/std/Thread/Futex.zig b/lib/std/Thread/Futex.zig
index a896942d6e..5a3da5cd94 100644
--- a/lib/std/Thread/Futex.zig
+++ b/lib/std/Thread/Futex.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Futex is a mechanism used to block (`wait`) and unblock (`wake`) threads using a 32bit memory address as hints.
 //! Blocking a thread is acknowledged only if the 32bit memory address is equal to a given value.
 //! This check helps avoid block/unblock deadlocks which occur if a `wake()` happens before a `wait()`.
diff --git a/lib/std/Thread/Mutex.zig b/lib/std/Thread/Mutex.zig
index 522d1fe418..ee54a1582b 100644
--- a/lib/std/Thread/Mutex.zig
+++ b/lib/std/Thread/Mutex.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Lock may be held only once. If the same thread tries to acquire
 //! the same mutex twice, it deadlocks.  This type supports static
 //! initialization and is at most `@sizeOf(usize)` in size.  When an
diff --git a/lib/std/Thread/ResetEvent.zig b/lib/std/Thread/ResetEvent.zig
index bbf9e7263a..d9304dd70b 100644
--- a/lib/std/Thread/ResetEvent.zig
+++ b/lib/std/Thread/ResetEvent.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A thread-safe resource which supports blocking until signaled.
 //! This API is for kernel threads, not evented I/O.
 //! This API requires being initialized at runtime, and initialization
diff --git a/lib/std/Thread/RwLock.zig b/lib/std/Thread/RwLock.zig
index 0721aad3f7..cfe06c76e8 100644
--- a/lib/std/Thread/RwLock.zig
+++ b/lib/std/Thread/RwLock.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A lock that supports one writer or many readers.
 //! This API is for kernel threads, not evented I/O.
 //! This API requires being initialized at runtime, and initialization
diff --git a/lib/std/Thread/Semaphore.zig b/lib/std/Thread/Semaphore.zig
index 169975b362..b5bde88d73 100644
--- a/lib/std/Thread/Semaphore.zig
+++ b/lib/std/Thread/Semaphore.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A semaphore is an unsigned integer that blocks the kernel thread if
 //! the number would become negative.
 //! This API supports static initialization and does not require deinitialization.
diff --git a/lib/std/Thread/StaticResetEvent.zig b/lib/std/Thread/StaticResetEvent.zig
index e15a6a0a54..d779a4de9e 100644
--- a/lib/std/Thread/StaticResetEvent.zig
+++ b/lib/std/Thread/StaticResetEvent.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A thread-safe resource which supports blocking until signaled.
 //! This API is for kernel threads, not evented I/O.
 //! This API is statically initializable. It cannot fail to be initialized